Creo官方oDown设计资料

Top-Down

DesignToolsManaging

Complex

AssembliesVictor

RemmersHolland

Engineering

Consultants

BVTips

&TechniquesTop-Down

Design

Philosophy2©

2006

PTCTraditional

Design

Approach“Bottom-Up

Design”Design

of

individual

components

independent

of

the

assemblyManual

approach

to

ensure

that

components

fit

properly

and

meet

the

designcriteriaComponents

and

those

placed

in

sub-assemblies

are

brought

together

todevelop

the

top-levelassemblyErrors

are

manually

identified

and

modifications

to

each

component

are

madetomake

the

adjustment.

As

assembly

grows,

detecting

these

inconsistencies

andcorrecting

them

can

consume

a

considerable

amount

of

timeTop

LevelAssemblyComponentDesign3©

2006

PTCComponentDesignComponentDesignPossible

example

Bottom

Up?Mate4©

2006

PTCTop-Down

DesignPhilosophy“Top-Down

Design”Method

of

placing

critical

information

in

a

high-level

locationCommunicating

that

information

to

the

lower

levels

of

the

productstructureCapturing

the

overall

design

information

in

one

centralized

locationDesignInformationComponentComponentComponent5©

2006

PTCA

more

integrated

approach….6©

2006

PTCTop

Down

Design

Stages

– It

is

a

concept.6-Stage

ProcessConceptual

Engineering

PhaseLayouts

and

Engineering

NotebookPreliminary

Product

Structure

PhasePro/INTRALINK,

Model

TreeCapturing

Design

Intent

PhaseSkeleton

ModelsManage

Interdependencies

PhaseReference

Viewer

&

Reference

GraphCommunication

of

Design

Intent

PhaseCopy

Geoms,

Publish

Geoms

&

ShrinkwrapPopulation

of

the

Assembly

PhaseAutomatic

Component

Constraints

&

Component

Interfaces7©

2006

PTCThe

Bobcat

example8©

2006

PTCConceptual

Engineering

PhaseLayouts

and

Engineering

NotebookUnderstand

Existing

SituationHigh-level

RequirementsSpace

AllocationDefine

New

Space

and

Motion2DSketches3DModelsRapid

Iteration

&

ConvergenceAnimationsCapture

Key

Design

IntentParametersNotesSpreadsheetsProprietary

DataStage

19©

2006

PTCPreliminary

Product

Structure

PhasePro/INTRALINK,

Model

TreeQuickly

define

product

hierarchyBefore

any

of

the

components’

geometry

is

definedIntuitive,

automatic

mapping

to

“start

models”Templates

ensure

all

designs

share

the

necessary

commonelements

such

as

layers,

views

&

parametersFoundation

for

efficient

task

distributionAssembly

Population

EnvironmentsPro/E

menus

and

Model

Tree

pop-up

menusPro/INTRALINK

and

PDMLinkComponent

Creation

MethodsEmpty

Components;

Copy

from

start

modelsAutomatic

assembly

of

default

datumsUnplaced,

Partially-

&

Over-Constrained

ComponentsStage

210©

2006

PTCCapturing

Design

Intent

PhaseSkeleton

ModelsWhat

needs

to

happen?Capture

conceptual

design

parameters

within

the

contextof

theassemblyCapture

&

control

critical

object

interfaces

in

a

single,convenient

locationHow? Skeleton

Models…Centralized

pathway

for

communicationFacilitate

task

distributionPromote

well-organized

design

environmentsEnable

faster,

more

efficient

propagation

of

changeSpecial

Treatment

in

BOMs,

Simplified

Reps,

Drawings,Model

Tree

&

Mass

Property

CalculationsUniquely

supported

Scope

Control

SettingStage

311©

2006

PTCManage

Interdependencies

PhaseReference

Viewer

&

Reference

GraphTools

to

Manage

ReferencesExternal

Reference

ControlEnsures

Top-Down

Designmethodology

is

followedIncorporate

design

management

rulesdirectly

into

the

designEnsures

proper

design

reusePro/INTRALINKModelTreeGlobal

Reference

ViewerReference

GraphStage

412©

2006

PTCCommunication

of

Design

Intent

PhasePublish

Geoms,

Copy

Geoms

&

InheritancePublish

Geometry

FeaturesProvides

ability

to

pre-determine

the

geometry

to

be

referenced

by

a

CopyGeometry

featureAllows

designers

to

define

their

interfaces

to

the

rest

of

the

designCopy

Geometry

FeaturesAllows

copying

of

all

types

of

geometrySurfaces,

edges,

curves,

datums,

quilts,

copy/publish

geometryRetains

copied

geometry

name

and

layer

settingsDependency

on

parent

geometry

can

be

toggledCan

be“Externalized”External

Copy

GeometryBuild

relationships

on

external

models

independent

of

an

assemblyUseful

for

coordinate

system

assembly

practicesInheritance

–

Inherit

model

geometry

for

one-way

associativityShrinkwrap

(included

in

Foundation

Advantage

Package)Stage

513©

2006

PTCPopulation

of

the

Assembly

PhaseAutomatic

Component

Constraints

&

Component

InterfacesWhat

tools

are

available

for

populatingtheassembly?Assembly

ToolsDrag

&

Drop

PlacementComponent

InterfacesComponent

CreationWithin

the

context

of

the

assemblyMirror

Parts

orSubassembliesStage

614©

2006

PTCHow

does

Top

Down

Design

relate

to

company

goals?15©

2006

PTCFour

Goals

from

Upper

ManagementCycle

Time

Reduction.Increase

User

Satisfaction

with

Software.Margin

Increase.Cost

Reduction.Whyshouldyouuseit?16©

2006

PTCBenefits:ReduceddesigntimeReducederrors(rightthefirsttime)IncreasedqualityBetterprojectmanagementvisibilityConcurrentengineeringConfidenceintop-levelregenerationKnowledgeofhowmodulesinterfaceTop-levelchangecontrolExample:todesignanalternator...CompleteTop-LevelAssembly540MBAllSkeletonModelsinTop-LevelAssembly70MBWhatinformationshouldadesignerneedtoworkwithmosttimes?NeighboringSu众bassemblies320MBSubassembly,withSkeletonModelcontainingallrequiredinformation~20MB17©

2006

PTCWhatdoesanexamplelooklike?ThreePhasesPro/INTRALINKPro/CONCEPTISDXPro/ENGINEERPro/NOTEBOOKCONCEPTUALDESIGNCAP待T删URE葱D榨ES诉IG嘴NC隆R霉I找TER如IA靠18©

2006

PTCDET免AI毁LE蓄DD半钢ES滋IGN通ProductDefinition19©

2006

PTCProductDefinition:EngineeringLayoutWhatitis:FirstthingdoneindesigncycleUsedtoevaluatekeyinterfacepointsUsedtoevaluatekeycomponentsofprojectWhatitisNot:ThreedimensionalsolidsFullydetailed20©

2006

PTCAdvantagesofUsingaLayout21©

2006

PTCDocumentdesigninformationinonecentralizedlocationDocumentdesigninformationbeforecreatingsolidmodelsInvestigatedesignoptionswithoutinvolvingtheentireassemblyEasilymakedesignchangesbecauseallofthedesigninformationiscontainedinonelocation#2ProductDefinition:AssemblyStructureWhatitis:VirtualAssembly/BOMUsedtoorganizeassembly&assigningofdesigntasksUsedtoinputnon-geometricaldataup-frontWhatitisNot:ThreedimensionalsolidsFullydetailedFullyconstrained22©

2006

PTCAdvantagesofDefiningPreliminaryProductStructureDefiningtheproductstructurepriortodefininggeometrycanassistyouinorganizingtheassemblyintoman匹ageabletasksthatcanbeassignedtodesignteamsorindividualdesigners.Associatespecificlibraryparts(thataretobeusedont树heproject)withtheassemblyatthestartofthedesign,preventingconfusionlater.23©

2006

PTCAdvantagesofDefiningPreliminaryProductStructureCont…SubmittheassemblytoPro/INTRALINKorPDMLinkandassignmodelstotheappropriatevaultsorfolders.Individualdesignerscanfocusonspecificdesigntasksinsteadofonhowtheirdesignisgoingtofitintotheov盲erallstructure.Inputnon-geometricalinformationsuchasthepartnumb类er壳,d投玻esi螺gn眯er觉’s脆n拖a擦me,转e伴tc健.,敌a惰ta殖v偿e馒ry贪娃ear忠ly丧s迟ta遮ge爸.24©

2006

PTC#3ProductDefinition:SkeletonsWhatitis:Zero-massgeometryExactlocationdetailMinimizedgeometricdetailWhatitisNot:ThreedimensionalsolidsFullydetailed25©

2006

PTCAndDefinitelyNotThis!!26©

2006

PTCAdvantagesofUsingSkeletons27©

2006

PTCProvidesacentralizedlocationfordesigndataSimplifiesassemblycreation/visualizationAidsinassemblingmechanismsMinimizesunwantedparent-childrelationshipsAllowsyoutoassemblecomponentsinanyorderControlspropagationofexternalreferencesCentralsourceforinformation28©

2006

PTCBenefitsofCommunicatingInformationFromaCentralSourceTaskdistributionConcurrentModelingManagingExternalReferencesToolsDeclarationPublishGeometryCopyGeometryHierarchyTop_level.asmTop_level_skeleton.prtSub_assy_1.asmSub_assy_1_skeleton.prtSub_assy_2.asmSub_assy_2_skeleton.prt29©

2006

PTC3DDesign…Finally!30©

2006

PTC

Thefoundationisset…buttopologicallymodifiable…it’stimefor3D.

WithReferenceControlManager,youaresafetocreateyourpartsdirectlyintheassembly.MoreThanMeetsTheEye!31©

2006

PTCInterchangeability:FamilyofTablesInterchangeAssemblyLayoutDeclarationsPowerofTop-DownDesign32©

2006

PTCToAchieveAdvancedAutomation,considerusing:RelationsPro/ProgramMiscellaneousTips33©

2006

PTCSeparatePartVersusAssemblyforSkeletonFeaturesAvoidconstructingassembly-levelskeletonfeaturessincethesystemrequiresthatyouperformalleditsofthesefeaturesinAssemblymode.Thecomponentscanbecomeanobstructionanddegradeperformance.Furthermore,youcannoteasilyreuseskeletonfeaturesattheassemblylevelinothersubassemblies.Byusingaseparatepartfile,youcaneditthefeatureinPartModeandreassembleitintomanydifferentassemblies.GeometryFeaturesPlaceallstaticinformationinaskeletonasearlyaspossibleandplacealldynamicinformationlaterinthedesignprocesscycle.MiscellaneousTips34©

2006

PTCDatumsforSkeletonModelsConsiderrenamingskeletondatumsto“sk_”VisualizationUsesimplifiedrepsandtransparencyprolificallytomakeviewingeasierUse“displaystates”tohighlightdifferentitemsatdifferenttimesUsesurfacestoclarifymeaningofcenterlines&axesConceptualizationDon’tbeafraidtousesimplehandsketchesbeforedelvingintocomplexsituations…it’sNOTillegalPro/EWildfireEnhancementsHigh-performanceAssemblyModelingLightweightComponentsRepresentcommoncomponentswithlightweightgraphicsforoptimumdisplayspeedAccuratemasspropertiesandBOMsCustomizablesymbolicrepresentationsFlexibleComponentsRepresentmultiplestatesofasinglecomponentinanassemblyAddressescriticalneedforconsistencybetweenBOMandassemblymodelIntelligentRegenerationAssemblyregenerationisupto80%Faster!35©

2006

PTCHighlightsofTop-DownDesignCaptureknowledge,ordesignintent,allowingyoutoconcentrateonsignificantissuesbymakingthesoftwareperformtedious,repetitivecalculations.Enabletheframeworkforinterchangeabilityofcomponentsallowingforhigh-velocityproductdevelopmentbysupportingrapiditerationsofproductvariations.36©

2006

PTCNewinAdvan